feat: implement sym_hash() function for mach-o module

[latonis]

Implement the sym_hash() function for the mach-o module to hash all of the symbol table entries, if the binary has not been stripped. This did not include new parsing, only utiIizing the entries we already parsed

• tests included

[plusvic]

Clippy says...

error: this `.filter_map` can be written more simply using `.map`
   --> lib/src/modules/macho/mod.rs:467:35
    |
467 |       let symtab_hash_str: String = symtab_to_hash
    |  ___________________________________^
468 | |         .iter()
469 | |         .filter_map(|e| {
470 | |             Some(String::from_utf8(e.to_vec()).unwrap().trim().to_lowercase())
471 | |         })
    | |__________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_filter_map
    = note: `-D clippy::unnecessary-filter-map` implied by `-D clippy::all`
    = help: to override `-D clippy::all` add `#[allow(clippy::unnecessary_filter_map)]`

[latonis]

Addressed the review and comments @plusvic 😸 , thanks for the quick review!